Replace SearchReplaceDiffStrategy with NewUnifiedDiffStrategy in getDiffStrategy function

src/core/diff/DiffStrategy.ts

@@ -1,6 +1,7 @@
 import type { DiffStrategy } from './types'
 import { UnifiedDiffStrategy } from './strategies/unified'
 import { SearchReplaceDiffStrategy } from './strategies/search-replace'
+import { NewUnifiedDiffStrategy } from './strategies/new-unified'
 /**
  * Get the appropriate diff strategy for the given model
  * @param model The name of the model being used (e.g., 'gpt-4', 'claude-3-opus')
@@ -9,7 +10,7 @@ import { SearchReplaceDiffStrategy } from './strategies/search-replace'
 export function getDiffStrategy(model: string, fuzzyMatchThreshold?: number): DiffStrategy {
     // For now, return SearchReplaceDiffStrategy for all models
     // This architecture allows for future optimizations based on model capabilities
-    return new SearchReplaceDiffStrategy(fuzzyMatchThreshold ?? 1.0)
+    return new NewUnifiedDiffStrategy()
 }
 
 export type { DiffStrategy }